Study on network safety strategy against DDoS attack 102064515 林昀欣 2010 IEEE International Conference on Advanced Management Science (ICAMS) Xiaoming Bi,

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Presentation transcript:

Study on network safety strategy against DDoS attack 林昀欣 2010 IEEE International Conference on Advanced Management Science (ICAMS) Xiaoming Bi, Qiansheng Zheng(Correspondence Author)

Outline  DDoS Attacks Principle  SOA (Service-Oriented Architecture)  SOAP (Simple Object Access Protocol)  SOA-based DDoS Defense Framework  Verification  Conclusion  Reference 2/11

DDoS Attacks Principle  use reasonable service request  manufacture large useless data  use connection defects of provided service  send malformed data 3/11

DDoS Attacks Principle (cont.)  Smurf attack  Fraggle attack  Trinoo attack  TFN2k attack 4/11

SOA (Service-Oriented Architecture)  a component model  three elements: services, loosely coupled, message delivery  example: Web Service 5/11

SOAP (Simple Object Access Protocol)  use XML (Extensible Markup Language)  contain sub-elements Header and Body within the Envelope  exchange structured information 6/11

SOA-based DDoS Defense Framework  overlay network: routing node, serving node  communications between nodes are encrypted  hide the location of the server  clients have to request for certificate first  allocate different bandwidth to different flows 0.1 for request flow, 0.9 for flow with certificate  use client puzzle mechanism  internal restructuring 7/11

SOA-based DDoS Defense Framework (cont.)  four packet types: request, response, normal, update  final certificate is composed of pre-certificate, byte limit and time limit 8/11

Verification  upstream bandwidth of clients and attackers = 1MB/s bandwidth between routing and service nodes = 10MB/s  Test 1: client sends document around 100MB attacker sends large number of requests  Test 2: client sends document around 100MB attacker sends large number of data packets (internal collaborators exist) 9/11 attack is launched129 seconds attack is not launched127 seconds attack is launched243 seconds attack is not launched127 seconds

Conclusion  this framework is effective 10/11

Reference  What Is Service-Oriented Architecture  What Is SOA  SOAP Version /11